Adjustable chair.



No. 882,983. PATENTED MAR. 24, 1908.

\ L. c. WENTWORTH.

ADJUSTABLE CHAIR.

APPLICATION rum) HAYS, 1907.

I i H'NESSES //VVE.'V TOR} LESLIE COLBY WENTWORTH, OF WEBSTER, MASSACBUSETTS.

snmsrnnm exam.

Specification of Letters Patent.

Patented Inch 24, 1908.

Application filed Kay 8, 1907. Serial No. 372,563.

To all whom 'it may concern:

Be it known that I, LESLIE C. WENT- won'rn, a citizen ofthe United States, residing at Webster, in the county of Worcester and State of Massachusetts, have invented a new and useful Adjustable Chair, of which the following is a s eciiication.

This invention re ates to improvements in stands for supporting chairs, tables, and other articles in different adjusted positions, and it has for its object more es ecially to rovide a stand that is particular y ada ted or use in connection with chairs suc as those used in factories and other places where it is desirable to adjust the chair vertically, angularly, and also in a direction toward and from the bench or table at which the operators are working, whereby the chairs may be adjusted exactly according to the Wishes or requirements of each individual, the chair support or stand occupying a minimum of floor space so that the waste may be easily removed and the floors cleaned without disturbing the occupant of the seat.

A further object of the invention isto provide a stand or-su port of the character described, that may e made and sold at a relatively small cost, is durable and not liable to get out of order, and that is capable of being used generally on tables and various other articles wherein it is desirable or necessary to support the same in different adjusted positions.

To these and other ends, the invention comprises the various novel features of construction and combination and arrangement of parts, which will be hereinafter more fully described and pointed outparticularly in the claims appended hereto.

In the accompanying drawings :Figure 1, is a side elevation of a chair constructed in accordance with the present invention. Fig. 2 represents a partialcentral vertical section on the line 22 of Fig. 1. Fig. 3 is a detail View of an automatic locking device for supporting the chair in different vertical positions relatively to the base.

Corresponding parts in the several figures are indicated throughout by similar characters of'reference.

As previously stated, the invention 13 capable of being applied to chairs, tables, and

ing longitudinally of t e guide.

various other articles wherein it is desirable to support them in dilferent positions of adjustment, and, in the present embodiment of my invention, it is shown in connection with a chair of a kind that is adapted for use in factories, stores, and other places wherein it is desirable to arran ethe chairs in 006 erative relation with a bench, counter, tab e, or other object.

The chair shown in the present embodiment of theinvention is especially adapted for use in factories, as it permits the operator to have his chair adjusted exactly according to his wishes, either as to elevation, angular relation between the chair and the bench, or as to the distance between the chair and the bench, and it comprises, in the present instance, a base 1 having a flange 2 adapted to rest upon the floor or other support, the flange being preferably erforated to receive screws or other devices or fastenin r the base in lace. The base is rovide'd with a centra ly arranged upwardly extending stem 3, and arranged transversely of the latter is a guide 4 which extends parallel to the attaching flange. The guide is provided with a longitudinally extending slot 5, and cooperating with the guide is a segmental bracket 6 having a vertically extending portion which engages one side of the guide at points above and below the slot, and being provided with a laterally offset bearing portion 7 which rests upon the top of the guide and serves to sustain the weight imposed. u on the bracket, the latter bein' capable o operat- Suitable means are employed for locking the guide in different positions of adjustment in a direction longitudinally of the guide on the base, the device shown in the present instance embodying a screw or bolt 8 having its head arranged at one side of the guide, and its stem extending loosely through the slot of the guide and into the bracket, the screw or bolt being preferably threaded into the bracket so that a turning movement of its head will serve to ti hten or loosen it, al' though, if sopreferrec a simple bolt connection may be emplo ed for clamping the guide and bracket 1n xed relation.

The upper side of the bracket is preferabl of segmental form and corrugated or notched:

as shown at 9 in Fig. 1, and cooperating with this segmental surface is a complemental bearing member 10 which is arranged on the lower end of a post 11, the said bearing memporting post in a plane parallel to the lane.

of adjustment in a direction lon itudinally of the guide, and the post is loo ed in the different an ular positions of adjustment relative to t e base by means of a screw or bolt 14 which is threaded into the laterally oflset portion 7 of the bracket and 006 erates with the concentric clam ing su ace 13, tightening of the screw or olt servin to draw the cooperating bearin surfaces 0 the post and guide closely to st er, the corrugations serving to positive y prevent relative angular movement of the post relatively to the base.

The u per end of the post is provided with a laterally turnedlug 15 having a bore 16 extending vertically therethrough and substantially in alinement with the axis of the base when the post is in central position, and this lug serves to support the shaft 17, the upper end of the latter revolubly fitting a bearing 18 formed in a socket 19 which is rigidly secured to the under side of the chair or ot er object to which the invention is a plliled.

y suitable means ma be employed for securing the shaft at di erent HOSltlOIlS of adjustment in a direction vertica of the post, the means shown in Fi 1 an 200mprising a set screw 20 three ed through one side of the lug and serving'to clam the shaft, rotary movement of the shaft eing permitted by reason of the loose connection etween the socket thereon and the upper end of the shaft. In those cases where a set screw is employed for securing the shaft in different positions of adjustment in a direction vertically of the supporting post, the elevation of the chair or other ob ect relatively to the base may be adjuster by loosening the set screw.

In order to facilitate the vertical adjustment of the chair an automatic locking deviceis providedw 'ch embodies, in the present instance, a collar 21 having a bore 22 which is sribstantiallythe size of the shaft at the up r end of the collar and is enlarged tower the lower end of the latter'for the pur pose of permitting a relative tilting between the collar and the shaft, which will produce a clampirg action between the relatively sharp edges 0 the collar at the narrow portion of ts bore and the shaft. The locking collar seems porting post.

The invention is particularly applicable to chairs or stools such as are employed in factories, stores, and similar places, as the chair may be adjusted in a direction toward and from the bench or counter by loosening the screw 8 and sliding the bracket in the proper direction on the guide 4, and the angular'relation between the chair and the bench may be varied by loosening the screw 14and turning the sup orting post relatively to the bracket, while tlie vertical position or elevation of the chair may be adjusted after the set screw 20 of the locking collar 21, as the case may be, is released, and the chair is free torevolve on the upper end of the vertical shaft.

What is claimed is 1. In a stand of the character described, the combination with a suitable base, and a bracket supported thereon, of a supporting post having a laterally turned portion at its ower end arran ed to 006 erate with the said bracket an having a aterally turned portion at its upper end provided with an aperture having its axis arranged substantlally in alinement with the laterally turned portion first mentioned, a shaft extending through the said aperture and adjustable vertically relatively to the post, and a device for locking the shaft and the post in fixed relation.

2. In a stand of the character described, the combination with a suitable base, and a bracket-supported thereon, of asupporting post having a laterally turned portion at its ower end arranged to cooperate with the bracket and having a laterally turned portion at its upper end provided with an aperture having itsaxis arranged substantially in alinement with the laterally turned portion first named, a shaft extending throu h the aperture and adjustable vertically re a-. tively to the post, and means for automatically locking the shaft and post in fixed relation.

3. In a stand of the character described, a base havin a stem, a longitudinally slotted ride carrie by the stem and dis sed paralel with the base, a segmental toot ed bracket having an offset bearing upon the guide, a clamping bolt passing through the slot and into the bracket for holding the latter in adjusted positions relatively to the guide, a post having a toothed segmental longitudi nally slotted offset bearing upon the bracket and interlocking with the teeth thereof, a.

bolt passing through the slotted offset and into the bracket for holding the post in adto the bracket, and a vertically adjustab e shaft carried by justed positions relative] the post. 

